What will they drive in West Roxbury?

West Roxbury is the Southernmost part of Boston. It is much like a suburb, with individual houses on individual lots. Because many city employees (esp cops & firemen) are required to live in the city, it is full of them. And, they stay there when they retire. For some reason, the retired folk love Grand Marquis. A few years ago, I drove through West Roxbury almost daily, and couldn't believe how many of them I encountered. Every one was driven by a guy who looked older than dirt. Whatever will they do? :-)